Rules for a beacon bar and flash bar on public roads

Europe has harmonised UNECE rules for technical requirements, but each country determines the use on public roads. This article provides a clear overview of the rules for beacor bars and strobe bars in 2026 and offers practical guidelines for international use.

In this article you will read:
- What European rules apply to beacor bars and strobe bars
- When you may use a flashing light or beacon bar
- Differences between amber and blue light
- Important exceptions per country
- Practical points for fleets, buyers and engineers

European basis: UNECE regulations for a beacon bar

Within Europe, the technical requirements for flashing beacons and beacon bars are laid down in UNECE regulations. The most important standard is ECE R65, which specifically relates to optical warning signals.

ECE R65 specifies, amongst other things, the light intensity, visibility, flashing frequency and colour scheme of signal lighting. In addition, ECE R10 addresses electromagnetic compatibility, ensuring that the lighting does not cause interference with vehicle systems.

• Light intensity and visibility
• Flash frequency and light distribution
• Colour use, such as amber or blue
• Technical suitability for professional use on public roads

TRALERT®’s range of LED beacon bars fully meets these requirements.

When can you use a beacon bar?

The ECE standards specify how a beacon bar must function technically, but not when it may be used. This is regulated on a country-by-country basis. In virtually all European countries, amber warning lights may only be used in situations where there is a clear safety purpose.

• When working on or along the road
• For slow-moving or abnormal vehicles
• In exceptional transport
• For vehicles that temporarily shape an increased risk for other road users

Typical applications are suited to situations such as those described in our guide to lighting for heavy goods vehicles.

Colour use: amber vs blue

An important distinction within Europe is the colour of signal lights. Amber is used to warn, while blue is reserved exclusively for emergency services in most countries.

• Amber: for warning of work or abnormal traffic situations
• Blue: in almost all cases exclusively for emergency services and other legally designated vehicles

Want to know more about this distinction? Read also: are you allowed to have a blue rotating beacon?

Video: TRALERT® beacor bars in practice

This video shows how TRALERT® beacor bars are used in practice. This not only helps with product orientation, but also with the assessment of format, light image and application possibilities.

Important differences per country

Although the technical requirements are largely harmonised via ECE R65, the application (when and on which vehicle you are permitted to use amber warning lights) varies by country. For international fleets and OEM applications, it is advisable to check the national usage regulations with the local authorities in addition to ECE certification.

Netherlands

In the Netherlands, amber beacons may be used for work, transport with deviating dimensions and situations with increased risk. Use must always be functional. For the current rules and conditions: see the official explanation on the site of the central government.

Central government: When can you use beacons?

Germany

In Germany, the use of yellow signalling is more strictly linked to vehicle type and situation (e.g. work vehicles, exceptional transport). Please refer to the current StVZO regulations.

Gesetze im Internet: § 52 StVZO (Warnleuchten für gelbes Blinklicht)

Belgium

In Belgium, amber signal lights are permitted for dangerous situations or work on and along the road. Use must be directly related to the situation. For details: see the site of the FPS Mobility.

FPS Mobility: Traffic regulations - Lights and signals

United Kingdom

In the UK, amber beacon lights are permitted for slow-moving traffic, work vehicles and vehicles with a warning function. Blue is strictly for emergency services. Official rules via GOV.UK.

GOV.UK: Road Vehicles Lighting Regulations - Warning Beacons

Italy

In Italy, the use of yellow/orange lampeggianti is often linked to specific situations such as work traffic or exceptional transport. When used across borders, extra control recommended. See the Codice della Strada.

ACI / Ministero Infrastrutture: Art. 177 Codice della Strada (dispositivi lampeggianti)

Practical focal points for B2B applications

• Always opt for ECE R
• 65-certified beacor bars
• Check mounting position and visibility on the vehicle
• Adapt use to local regulations per country
• Avoid unnecessary use outside work or risk situations
• Combine where necessary with additional signalling or marking

FAQ: frequently asked questions on beacon bar legislation

Can you always use a flashing light while driving?

No, a flashing light or beacon bar should only be used when there is a valid reason for doing so, such as work, an abnormal traffic situation or an increased safety risk.

Is ECE R65 mandatory for beacor bars?

Yes, an ECE R65 certification is mandatory for use on public roads.

What is the difference between class 1 and class 2?

Class 2 has a higher light intensity and is more visible in daylight. This is particularly relevant for vehicles operating on busy roads during the day or which need to be visible from a greater distance at an early stage. More about ECE R65 Class 2

Can you use a blue flashing light?

In almost all European countries, blue light is only allowed for emergency services and other legally designated vehicles. For commercial applications, it is usually prohibited.

Are the rules the same across Europe?

The technical requirements, such as ECE R65, are largely the same. However, the actual use differs from country to country. Therefore, always check the local regulations when vehicles are used internationally.

Disclaimer:

At TRALERT®, we do our best to keep the information in this article as accurate and up-to-date as possible, including the regulations surrounding vehicle lighting. However, legislation can change regularly, and although we make every effort to implement these changes in a timely manner, it is possible that certain updates or adjustments have not yet been incorporated into this article. We therefore always advise our readers to check the current legislation with their local government or regulatory bodies, especially when it comes to exceptions or specific national regulations. TRALERT® is not liable for any damages or fines resulting from outdated or incomplete information in this article.

If in doubt, always contact the competent authority to ensure that your vehicle meets all legal requirements.